1. In the previous E2E answers, some of your colleagues said that the detection principle of LDC and FDC is similar, and attached this document. https://www.ti.com/lit/an/snoa950/snoa950.pdf?ts=1596163453917
How to get the formula (1) - (2) in this technical document? What are the mathematical expressions of Vsensor and iDrive? Please expalin it in detail.
2. In this answer, it is said that the driving signal of iDrive is half sine wave, so what kind of waveform is iDrive?
3. I have EVM version now. What I want to know is whether the internal working principle I understand is correct.
My understanding is that iDrive configuration will only change its effective value (or peak value?), and its frequency will change constantly. Only at resonance frequency, LC parallel resonance has the largest impedance and the highest voltage amplitude. Therefore, if a larger output voltage is detected, it can be assumed that resonance has occurred at this time. This frequency is then regarded as a resonant frequency. Is my understanding correct?
Please answer my question clearly instead of vague answer. Thank you very much.
